Power transmission



Jan. 16, 1923.

H. GUSDORF. POWER TRANSMISSION.

FILED MAY 23,192].

Wwwxwmw bnnnnnnnnnnnnnnnnnnnn uuuuuuuuuuuuuuuvuuvq lnaent'oru Patented Jan. 16, 1923.

UNITED STATES PATENT OFFICE.

HAROLD I. GUSDORF, OF INDIANAZPOLIS, INDIANA.

I rowan rnansmssron.

Application filed Kay 25, 1921. Serial No. 472,574.

To all whom it may concem:

Be it known that I, HAROLD M. GUSDQRF, a

citizen of the United States, residing at Indianapolis, in the county. of Marion and State of Indiana, have invented new and which is the most remote from a pulley around which the belt operates. Thls is to.

avoid that stretching and consequent loosening of the belt which reduces its efficiency, and, as supplementing this quality in the belt, the further object-of my invention s to provide a less firm opposite side, also pitted with cup-like depressions that w1ll give a vacuum-grip against the face of the pulley and provide room in the cups for the mate.- rial of the inner curve of the belt, which is compacted in passing around the pulley, thereby avoiding strain on the firm outer belt surface.

A further object is to utilize hog-skin leather, tanned to preserve the desired inelastic grain surface and cup formations natural to it, and to join the leather strips required length and of uniform strength and efliciency.

I accomplish the above, and other objects which will be disclosed hereinafter, by the means illustrated more or less diagrammatically in the accompanying drawings, in which- Fig. 1 is a longitudinal vertical section of two' pieces of hog-skin leather, magnified,

showing the manner in' which the adjacent ends to be joined are cut on abevel and the resulting thin edges removed. Fig. 2, is a similar view in sections on the line 2-2 of Fig. 3, showing the beveled ends cemented together to .form a continuous belt. Fig. 3, is an underside view of a portionof my improved belt formed of two joined pieces. Fig. 4, shows two pulleys connected by my improved belt, and Fig. 5 is a cross section of hog-skin leather greatly magnified to show interwoven fibres imparting a firm surface to the leather on the grain side, and

together in a manner to produce a belt of the showing the cup-like indentations of the 1 opposite side.

Like reference numerals indicate like parts in the several views of the drawings. The outer firm belt surface is represented by the heavy line= 6, in the drawings, and the cup-like indentations are shown at 7.

The latter provide the s'pacesfor the displacement of the belt material on the side next to the pulley in the bending of the belt around the pulley; and the'exhaustion of air in them caused by this partial closure toproduces a partial vacuum that adds to the pull of the belt on. the pulley. This inner elt'surface, pitted with cups 7;, is sufficiently elastic to secure the required change in surface area on that side to fit the belt to the curvature of the. pulley without straining the outer side of the belt, and a line of pull on the outer side of the belt of unvar mg length is obtained, which adds material y to the life and efiiciency of the belt.

It is necessary in practice to join the ends of a straight strip together into a continuous belt, and-often, andparticularly where hogskin leather is the source of supply for such strips, to' connect a plurality of shorter lengths into longer ones; and this requires a '65 ward each other of the walls of the cups I It is also desirable, in most cases, to remove the sharp end shown by the dotted lines d, of the firm side of the belt for the reason that this end is more apt to become loose and start a rupture'of the joint if left on. The difliculty is overcome by the removal in the manner shown, thereby forming a reverse bevel which, when the ends are cemented together and the. joints pressed in the usual manner, makes a practically smooth and more satisfactory job.

It is known that there is a difference in density between the ham-and shoulder-ends of the hog-skin, the ham end being the firmer, which, in one-ply belts, requires that as much of the dense side of the shoulderends be left as possible, and the cut made on the firm side of the ham-end, as shown in Figs. 1 and 2. Thereby, the ham-end is my invention to hog-skin or any certain malapped by the shoulder-end and a stronger terial more than is required by the appended joint is secured than if the ends were re-' claim. versely beveled. I claim 5 While I have here illustrated and men- A ho -skin belt having the flesh side next 15 tioned hog-skin leather as a natural product the pul ey and the grain side out. when suitably treated in tanning, a belt ma- Signed at Indianapolis, Indiana, this the terial having the same essential characteris- 23rd day of May 1921. tics may be produced entirely by-artificial 10 means, and I therefore do not desire to limit HAROLD M. GUSDORF. 

